JPS63959A - Connecting method of button-form cell to thin electronic appliance - Google Patents

Abstract

PURPOSE:To make it possible to restrict the thickness of a thin electronic appliance, by furnishing a soldes layer on a printed wire conductor pattern, and connecting by contacting pips furnished at the terminal to be the sealing plate of a button-form cell concurrently, to the solder layer. CONSTITUTION:A solder layer 3 is furnished on a printed wire conductor pattern 2 of a thin electronic appliance. Pips 9 are made at a negative elctrode side terminal to be a sealing plate of a buttonform cell to be installed concurrently. Then, by contacting the terminal so that the pips 9 are inserted into the solder layer 3, and by fixing with a cell fixing frame 4, the button-form cell 6 is installed to the thin electronic appliance. In such a way, the connection can be made easily with no excessive processes or parts, while causes of improper connection are eliminated since the oxide membrane over the solder layer 3 is broken by the pips 9. Therefore, the cell can be installed effectively without increasing the thickness of the thin electronic appliance.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a connection method for connecting a button-type battery to a thin electronic device such as a memory card, a card-type calculator, or an IC melody.

BACKGROUND OF THE INVENTION With the development of electronics, thin electronic devices with various functions have been developed. The most common method for connecting devices and batteries is to connect the positive and negative terminals located above and below the button battery with spring terminals provided on the device, but this method requires thinness. In terms of equipment,
Because these spring terminals add to the thickness, strategies have been developed to attach one terminal from the side of the battery.

Problems to be Solved by the Invention However, in the method in which one terminal is in contact with the side surface of the battery, this surface is composed of an arc as the body of the button battery and an arc for bending the seal. Since there is no surface space, and they exist only as lines or points, a sufficient contact state cannot be obtained, resulting in frequent complaints of poor contact.

The present invention attempts to utilize the upper and lower terminal surfaces of a button battery within a limited space to ensure a stable contact state.

Means for Solving the Problems In order to achieve the above object, the present invention uses the solder layer on the conductive pattern of the printed wiring board as it is for one terminal on the device side, and connects it to the other terminal. It is a combination of a battery equipped with a pip.

Function By using the solder layer on the conductive pattern of the printed wiring board as one terminal on the device side without any modification, the thinness required for thin devices is eliminated, and this solder layer By horizontally inserting a battery with binops into the solder layer, the oxide film formed on the surface of the solder layer is broken by the battery pips, resulting in good electrical contact.

Example Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of a battery 6 attached to a power terminal section on the equipment side in an embodiment of the present invention. A conductive pattern 2 for configuring an electronic circuit is provided on a substrate 1, and a solder layer 3 is applied to the portion that contacts the battery. A battery fixing frame 4 for fixing the battery also serves as the other power supply terminal, its position is regulated by a hole 5 provided in the substrate 1, and the battery fixing frame 4 is fixed to the substrate by soldering to a conductive pattern.

FIG. 2 is a view of the power supply terminal section viewed from above. The battery fixing frame 4 is provided with a notch 7 for obtaining good contact with the battery 6. Note that the printed wiring pattern is omitted in the figure. FIG. 3 is a side view of a battery used in an embodiment of the present invention, in which a bip 9 is provided at the center of the negative terminal 8, which also serves as a sealing plate for the battery.

Conventionally, there have been examples of cylindrical dry cells and other batteries with a total height of 5M or more being provided with pips, but there have been no examples of providing a pip on thin batteries with a total height of 5mm or less.

In this embodiment, the solder layer on the printed wiring conductive pattern is directly used as a power terminal on the device side, and a battery having a pip provided on the terminal portion on the battery side that comes into contact with this terminal can be connected in combination.

Effects of the Invention In this way, since the solder layer on the printed wiring conductive pattern is used as it is for one of the power supply terminals on the device side, no extra man-hours or parts are required, so costs can be rationalized.

In addition, in the thickness direction, there is no extra material other than the board, battery, and battery fixing frame, which helps reduce the thickness of thin devices.

Furthermore, the cause of poor contact caused by the formation of an oxide film on the surface of the solder layer can be eliminated by the pip breaking the film when the battery is inserted, and since the connection method involves biting the pip into the solder layer, the solder layer has a dimensional cushioning effect in the thickness direction. Effects such as this can be obtained.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the power terminal section on the equipment side in the present invention;
FIG. 2 is a top view of the same, and FIG. 3 is a side view of a battery used in combination with the power terminal section. 1...Substrate, 2...Conductive pattern, 3
...-Solder layer, 4...Battery fixing frame, 6.
...Battery, 7...Notch, 8...
・Battery negative terminal, 9...bip. Name of agent: Patent attorney Toshio Nakao and 1 other person f-
1 bowl 2-11 venerable person \゛ turn Fig. 1 3-f-B4 4-i Otsu 1 fixed tithe 5--, h, . 6-1-no f-v

Claims (1)

[Claims] At least one of the battery connection terminals of a thin electronic device is a solder layer coated on a conductive circuit pattern on a printed wiring board, and the battery that comes into contact with this is a battery with a pip provided in the terminal. A method for connecting a button-shaped battery to a thin electronic device characterized by: